JosephW I feel quite silly that I haven't been able to find it.
The Kontakt user interface is often counterintuitive, so nothing to feel silly about!
In the top bar you see a floppy disk icon, cog wheel icon, and then an icon that resembles tiles. If you click that one, you can toggle more windows to be displayed, amongst those the window where you can set up the output signal treatment (I don't remember what the window is actually called, but that'll probably be obvious).
Cheers and happy playing,
HZ
